| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radiographic imaging system that performs filter correction without generating artifacts even in a high-contrast area of a tomographic image, while preventing increase of computation time. <P>SOLUTION: The radiographic imaging system is adapted to reconstruct a tomographic image in a predetermined cross section of a subject from a plurality of projection images of a subject acquired in tomosynthesis imaging. The radiographic imaging system comprises: a frequency filtering processing part for producing a plurality of band limiting image signals having different frequency response characteristics from projection image signals corresponding to the projection images; a non-linear conversion processing part for performing non-linear conversion of band limiting image signals to reduce a portion of band limiting image signals exceeding a predetermined value; an integration processing part for accumulating the band limiting image signals which are non-linearly converted by the non-linear conversion processing unit to produce converted image signals; and a back projection processing part for reconstructing the tomographic image in the predetermined cross section of the subject from the converted image signals corresponding to the projection images. <P>COPYRIGHT: (C)2013,JPO&INPIT |
